while loop and delay Post: 302123014

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LEARN ABOUT SUNOS

sleep

sleep(1)							   User Commands							  sleep(1)

NAME

       sleep - suspend execution for an interval

SYNOPSIS

       sleep time

DESCRIPTION

       The sleep utility will suspend execution for at least the integral number of seconds specified by the time operand.

OPERANDS

       The following operands are supported:

       time	A non-negative decimal integer specifying the number of seconds for which to suspend execution.

EXAMPLES

       Example 1: Suspending command execution for a time

       To execute a command after a certain amount of time:

       example% (sleep 105; command)&

       Example 2: Executing a command every so often

       example% while true
       do
	       command
	       sleep 37
       done

ENVIRONMENT VARIABLES

       See  environ(5) for descriptions of the following environment variables that affect the execution of sleep: LANG, LC_ALL, LC_CTYPE, LC_MES-
       SAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	The execution was successfully suspended for at least time seconds, or a SIGALRM signal was received (see NOTES).

       >0	An error has occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       wait(1), alarm(2), sleep(3C), wait(3UCB), attributes(5),  environ(5), standards(5)

NOTES

       If the sleep utility receives a SIGALRM signal, one of the following actions will be taken:

	 o  Terminate normally with a zero exit status.

	 o  Effectively ignore the signal.

       The sleep utility will take the standard action for all other signals.

SunOS 5.10							    1 Feb 1995								  sleep(1)

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